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Discussion Starter #1
Hi folks,

I've had my 1L Matiz SE (+, I think) since Jan 2017. Using it as a daily run-around & commute...

Recently had all 4 new tyres + exhaust replaced...

Due to spongy brake pedal (seems to be very common?), I also bled through the (font only) brakes, a few months ago & regained some feel...
But compared to most cars - it still very spongy to me! (Used to a Mazda RX-8 though!).


Over past 2-3 weeks now, the ABS light comes on most days after a short drive and stays on until engine stopped / restarted.
I note the ABS light does light and stay on a while during start-up too (longer than I recall previously)...

I am aware of the ABS recall in 2012/2013 - and I believe when I checked my VIN, my car was not included (will check again tonight)...
I can see no evidence in Service manual the recall was performed either... I asked the prior owners for their service history and no sign in that either (was a courtesy car for a garage - well abused!?)
If it was recalled - is there a sure-fire way of checking??


I have a OBD / CANBus reader so will check for codes tonight as well...


Anyhow - without any further info - what's the general consensus on ABS faults? Expensive new ABS pump (£1000s??) or ABS sensor(s) (how much - easy DIY or garage?)
How best to check - and will it be my nearest "GM" (Therefore Vauxhual/Opel) dealer that can read the daigs properly?
 

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SRP, There could have been benefit in combining this with the existing topic on the same subject rather than create another stater topic when one already exists. Member Umpa has patiently worked his way through this issue for months with lots of suggestions and systematic feedback. Have you read up on his Topic? There might be helpful reading for you via the previous on this link:-

https://www.chevroletownersclub.co.uk/forum/21-matiz/6687-bleeding-abs.html

GM Chevrolet have a weblink giving service dealer locations but a decent Vauxhall dealer might have suitable diagnostic tools.
The following link gives you various possibilities:-
https://www.google.com/search?q=GM+...ome..69i57.16087j0j7&sourceid=chrome&ie=UTF-8
 

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Discussion Starter #3
Many thanks @Aussie Ed - Yes I had started to read that thread - but not all the way through as I was not sure that "bleeding the ABS" what exactly what I needed to know ;-)

I am mid re-read and will try to look at the advice therein... MOT is due very soon, and I don't want the garage to give be a multi ££-£££s solution to "ABS failure"... :)

Chevrolet Dealer locator I can see shows some Vauhall dealers (Evans Halshaw), but they're quite distant...
 

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Assuming its the ABS pump is like assuming you have cancer because you woke up with a headache!


Its a possibility, but so are many other things.


But first up, with the spongy brakes, turn the car off, and pump the brake pedal a few times to deplete the vacuum in the booster. Is the pedal rock solid after that?


If not, attempt too bleed the brakes again. Ensure the fluid level doesnt decrease by more than 2/3 or you will have to start again! If bleeding brakes has no effect hold constant pressure on pedal and see if it sinks over time. If so you have a leak somewhere, be it a caliper or an internal leak in the master CYL.


If the pedal is solid without vacuum, its likely normal.


With the ABS light, the quickest way to determine your issue is with a scan tool and check what the fault code is.


Its likely a wheel speed sensor, brake pedal switch etc
 

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Discussion Starter #5 (Edited)
Many thanks - and point taken about the self-diagnosis without evidence; goes to show that hitting the rabbit-hole that is the Umpa & 08matiz threads can lead to this kind of thing ;-)

I'll work my way through and do the static tests...

I'll check with my own scantool for a code (unless it requires specialist ones??)...

P.S. Any mods present - feel free to merge this topic with the others if it makes sense :)
 

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I had same problem on wife’s 07 after having new tyres fitted they had cracked the abs ring only slightly but enough that after driving it would come on. Bizarre it would sometimes not come on when it was raining.
 

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Discussion Starter #7
Outcome (eventually sent it to the local garage) was a broken ABS reluctor ring. Now fixed for a princely sum for a $5 part... :)
 
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